Running-out spring for guns.



No 640,54I. Patented Jan. 2, won.

A. T. DAWSON & a. T. BUCKHAM. RUNNING OUT SPRING FOR GUNS.

(Application filed. Aug. 28, 1899.) (No Model.)

W'Vestininster, London,

- UNITED STAT S ARTHUR TREVOR DAWSON AND GEO ATENT'I. FFIcE.

RGE THOMAS BUCKIIAM, OF LONDON ENGLAND, ASSIGNORS TO THE VIOKERS, SONS & MAXIM, LIMITED, OF

SHEFFIELD, ENGLAND.

RUNNING-OUT SPRING FOR GUNS.

SI ECIFICATION forming part of Letters Patent No. 640,541, dated. January 2, 1900.

Application filed August 28, 1899. Serial No. 728,791. (No model.)

To all whom it may concern:

Be it known that we, ARTHUR TREVOR DAW- SON and GEORGE THOMAS BUGKHAM, citizens of England, residing ,at 28 Victoria street,

England, have invented a certain new and useful Improvement in Running-Out Springs for Guns, (for which we have applied'for a patent in Great Britain, dated l ebrnary (3, 1899, No. 2,662,) of.

'iiighich the following is a specification. This invention relates to the construction of the running-out spring for a gun insuelh a manner that it can be readily adjusted to th'ef required degree of compression, and whenso adjusted it can, when desired, be removed from the gun and cradle without having its adjustment altered.

For this purpose, as shown in longitudinal section in the accompanying drawing, the spring a, which may be in several lengths, separated by washers b, is held in a tubular casing 0, through which. passes a central tubular -bolt d. The rear end of this bolt, which is fixed by a retaining-nut in a bracket e, 1 1'oject-ii rgtlio\vn from thegun, has a shoulder against which can bear a piston-shaped I collanflthe boss of which can slide on the the tubular casing .-r

on this is fitted a on p 1',

central bolt- (Z, whilcits periphery fits within "Their-out end of the central bolt (Z is internallythreaded to receive a compressorscrcw g', the head of which bears on a piston-shaped collar 72-, like f at the rear end, so that by turning; the screw y, andcollar 7t, compressing the spring, which af-' terward,expanding causes these parts to move forward advancing the gun to firing position.

When it is desired to remove the spring, 1 the retaining-nut m on the rear .of. the central bolt d is unscrewed. The casings, spring a, and the central bolt (2 can all be removed-to.- gether without any alteration of the spring adjustment.

Having thus de ribed the nature of this invention and the best means we know for carrying the same into. practical eifect, we claim- In a running-out spring for a gun, the comthe cradle in which the gun slides, the spring in inclosed in said casing, the central tubular gbolt (1 having fserew-t-hreaded, the bracket 6 depending from {the gun, a nut or for securing the rear end of said bolt in said bracket, the rear pistonshaped collar f and the front piston-shaped betwcen which collars the spring is held,'thc iadjusting I finternally-tln-eaded forward end of the ceni-tral-t'ubular bolt with the head of said screw bearing against the forward collar 71, and a cap-Z screwed onto the rear end of the tubular casing and provided with an internal flange bearing against the rear collar f, subthus advancing this collar it, the spring is compressed between it and the rear pistonshaped collar [to the desired extent. On the rear end of the tubular casing c is formed a sectional screw-thread or a set of sectional collars 7;, as on the breech-plug of a gun, and which has an internal flange bearing against the collar-.11 'lhe t-u hula-r casing being attached, as-ata, to the stantially as and for the purposes described. 2 In testimony whereof we have hereunto set four hands in preseucoof two subscribing witncsses.

Alt-Til l I R TREYOR II )A \VSON; GEORG H 'lllOMAS .HL Ch'l'IA WI. Witnesses:

S. V. Damon,

cradle in which the gun slides, the gun 'llOn HENRY KING.

bination of the tubular casing 0 attached to its forward end internally compressor-screw ginserted in the it reeoils draws back the central bolt and the Zcollar 7L placed on said central tubular bolt %in opposite ends ofthe tubular casing and: 

